Improvement in shaft-coupling



H. A. HURD. SHAFTy GOUPLING.

@einen tstre ste-nt @Hire .HIRML HURD, on SEYMOUR, GONNEGTIGT. I Letters Patent No. 67,878, dated August 20, 1867.

IMPROVEMENT 1N snmioonmne.

To ALL WHoM rr MAY coNcERN:

Be'it known that I, HIRAM A. HURD, of Seymour, inl the county of New Haven, and State of Connecticut, have invented anew Improvement in Machinery-Coupling; and Ido hereby declare the following, when taken Vin connectionwith the accompanying drawings and the letters of reference marked thereon, to be a full, clear,

vond exact description of the same, and which said` druwings constitute port of this specification, and represent, in- I l y I Figure 1, perspective view.

Figures 2 and 3, inside endsof the two parts.

Figure 4, o .section cutting through upon the foce ot' one of the parts.

This invention relates to an' improvement in couplings for connecting shutting and other similar mechanical uses, und consists inpthe peculiar formation of the two parte whereby they are easily locked together or separated, vand without the employment of bolt or screw; ond in order to the better understanding of my invention, as well as to enable others to construct the seme, I will proceed to a. description thereof as illustrated in the accompanying drawings. i

VA is the one part, B is the other'part, each provided with a. neck, C, into which the shaft to be coupled is inserted and secured inthe usual manner. Upon the face of euch of the twoparts a dove-tail, a, is formed, as seen in figs. 1, 2, and 3, leaving recesses D and projections E, the sides d of which are at right angles to the fece of the coupling, and the same side d of the'projection in each is out from the centre but nearly parallel with each other, as seen in gs. 2, 3, and 4, so that the projection of the one may be set into the recess of the other and turned so-that the dove-tail of the one will lock in the Vdove-tail of the other, as seen in figs. 1 and 4, aud when so turned the *sides oldform an open passage, F, through the coupling, as seen in tig. 4, and into this opening a key, G, iig. 1, is inserted, either passing through, or may be a key from each side which locks the two parts,-the dove-tail thus preventing their separation. If it should be `deemed advisable to secure the key in the coupling, a screw, H, or other device, may be introduced for that purpose. 'lo seperate the coupling remove the key and the loelr is released and the two parts easily separated.

v do not broadly lclaim securing tho two parts by coupling together by :i key passing therethrough, as such orrangeroent 'is'seen 'in tho-patent ot' Samuel Hull, May 29, 1860, butin that it will 5e observed that the key is formed to fit a. corresponding dove-tailed groove in each of the two parts of the coupling, so that dependence rests entirely upon the key to prevent the separation of the coupling laterally; neithergdo I broadly claim constructing a coupling with a projection upon part to set into a corresponding recess in the other part,o.s such is notnew. v i

Having thus fullyndescribedmy invention, what I claim as new and useful, and desire to secure by vLetters Potent, isi i i I coupling on the face of each Vpart of which are termed projections E E and recesses D, one side, a, of each of the projections of a dove-tail forre,"the other side, d, at right angles; the two parts set together and secured by key Gr, inserted between the right angles or parallel sides, Substantially as herein set forth.

HIRAM A. HURD.

4 Witnesses:

A. J. Trerrs, JOHN H.' SnUMwAY. 

